hank schaffer say deputy u.s. marshal graduating heading home to spokane, washington, with his partner zion. >> we'll do protective sweep around federal courthouses and different areas. so he'll be working as soon as we get back. >> reporter: they've trained together the past 10 weeks seven days a week. >> he gets a lot of attention. they never remember my name. they will remember his name. >> reporter: there are eight members of the police force in thailand in this graduating class. in 15 years they've been around they've trained 470 dogs who work in 21 countries, but their training does not stop when they graduate. >> once they leave here, they're not done. we maintain making sure they're kept in healthy conditions as well as making sure they're proficient in being able to detect all the various odors. >> reporter: atf trained dogs were used to gather evidence in the washington sniper shootings and countless other high profile cases. >> in fighting violent crime and preventing terrorism they're irreplaceable. >>